:root{
  --ink:#0A1320;--ink-2:#0D1A2C;--surface:#14253B;--surface-2:#1A2F4A;
  --line:#243A57;--line-soft:#1B2C44;
  --gold:#E6B92E;--gold-bright:#F5D27A;--gold-deep:#B8860B;--gold-glow:rgba(230,185,46,.35);
  --text:#EAF0FA;--text-dim:#9AB0CE;--text-mute:#6C7E99;
  --emerald:#34D399;--crimson:#EF6B6B;
  --f-display:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --f-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --r-sm:6px;--r-md:10px;--r-lg:18px;--r-xl:28px;
  --shadow-md:0 18px 50px -18px rgba(0,0,0,.55);
  --container:820px;--gutter:clamp(1.25rem,4vw,2.5rem);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--f-body);background:var(--ink);color:var(--text);line-height:1.7;font-size:1rem;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:var(--gold-bright);text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:4px}
::selection{background:var(--gold);color:var(--ink)}
h1,h2,h3{font-family:var(--f-display);font-weight:700;letter-spacing:-.022em;line-height:1.15}
.mono{font-family:var(--f-mono)}
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(2.5rem,5vw,4rem)}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;transition:background .3s var(--ease),backdrop-filter .3s}
.nav.is-scrolled{background:rgba(10,19,32,.78);backdrop-filter:blur(14px) saturate(140%)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.7rem;font-family:var(--f-display);font-weight:700;font-size:1.35rem;letter-spacing:-.02em}
.brand__mark{width:42px;height:42px;display:grid;place-items:center;flex:none}
.brand__img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 4px 10px rgba(230,185,46,.25))}
.nav__links{display:flex;align-items:center;gap:2rem}
.nav__links a{font-size:.92rem;font-weight:500;color:var(--text-dim);transition:color .2s}
.nav__links a:hover{color:var(--text);text-decoration:none}
.nav__cta{display:flex;align-items:center;gap:1rem}
.btn{display:inline-flex;align-items:center;gap:.45rem;padding:.6rem 1.1rem;border-radius:var(--r-sm);background:var(--gold);color:var(--ink);font-weight:700;font-size:.83rem;border:1px solid transparent;transition:transform .25s var(--ease),box-shadow .25s var(--ease);text-decoration:none}
.btn svg{width:15px;height:15px}
.btn--primary{box-shadow:0 8px 22px -10px var(--gold-glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px -12px var(--gold-glow);text-decoration:none}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn--ghost:hover{background:var(--surface);border-color:var(--gold);color:var(--gold-bright);text-decoration:none}
.nav__burger{display:none;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);align-items:center;justify-content:center}
.nav__burger span,.nav__burger span::before,.nav__burger span::after{content:"";display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.nav__burger span::before{transform:translateY(-6px)}
.nav__burger span::after{transform:translateY(4px)}
.nav.is-open .nav__burger span{background:transparent}
.nav.is-open .nav__burger span::before{transform:rotate(45deg)}
.nav.is-open .nav__burger span::after{transform:rotate(-45deg)}
.mobile-menu{position:fixed;inset:74px 0 auto 0;z-index:99;background:rgba(10,19,32,.97);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:1.5rem var(--gutter) 2rem;transform:translateY(-110%);opacity:0;visibility:hidden;pointer-events:none;transition:transform .4s var(--ease),opacity .3s var(--ease),visibility .4s;display:flex;flex-direction:column;gap:.4rem}
.mobile-menu.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}
.mobile-menu a{padding:.85rem 0;font-size:1.05rem;border-bottom:1px solid var(--line-soft);color:var(--text-dim)}
.mobile-menu a:hover{color:var(--gold);text-decoration:none}
.mobile-menu .btn{margin-top:1rem;justify-content:center}

/* hero */
.doc-hero{position:relative;padding-top:calc(74px + clamp(2.5rem,6vw,4rem));padding-bottom:clamp(1.5rem,4vw,2.5rem);overflow:hidden}
.doc-hero__glow{position:absolute;width:600px;height:600px;border-radius:50%;top:-200px;left:50%;transform:translateX(-50%);background:radial-gradient(circle,rgba(230,185,46,.16),transparent 60%);filter:blur(10px);pointer-events:none}
.doc-hero__inner{position:relative;z-index:2}
.doc-hero h1{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:.7rem}
.doc-hero .updated{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.1em;color:var(--text-mute)}

/* back button */
.back-btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.6rem 1.1rem;border-radius:var(--r-sm);
  background:var(--surface);border:1px solid var(--line);
  color:var(--text-dim);font-size:.85rem;font-weight:500;
  margin-bottom:1.25rem;transition:.25s var(--ease);text-decoration:none;
}
.back-btn:hover{color:var(--gold);border-color:var(--gold);text-decoration:none}
.back-btn svg{width:16px;height:16px;transition:transform .25s var(--ease)}
.back-btn:hover svg{transform:translateX(-3px)}

/* article */
.article{
  color:var(--text-dim);font-size:1rem;
  padding:clamp(1.8rem,3.5vw,2.8rem);
  border-radius:var(--r-xl);
  background:linear-gradient(165deg,var(--surface),var(--ink-2));
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
}
.article h2{color:var(--text);font-size:1.25rem;margin:2.4rem 0 .9rem}
.article h2:first-child{margin-top:0}
.article p{margin-bottom:1rem}
.article ul{margin:0 0 1.2rem;padding-left:1.4rem;list-style:disc}
.article li{margin-bottom:.5rem}
.article strong{color:var(--text)}
.article .lead{font-size:1.08rem;color:var(--text);margin-bottom:1.8rem}

/* footer */
.footer{border-top:1px solid var(--line);padding-block:clamp(2.5rem,5vw,3.5rem) 1.5rem;background:var(--ink-2);margin-top:3rem}
.footer__grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:2rem}
.footer__brand p{font-size:.9rem;margin-top:1rem;max-width:300px;color:var(--text-dim)}
.footer__col h4{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-mute);margin-bottom:1rem}
.footer__col a{display:block;font-size:.92rem;color:var(--text-dim);padding:.3rem 0;transition:color .2s;text-decoration:none}
.footer__col a:hover{color:var(--gold)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--line-soft);font-size:.83rem;color:var(--text-mute)}
.footer__legal{display:inline-flex;gap:1.5rem}
.footer__legal a{color:var(--text-dim);transition:color .2s;text-decoration:none}
.footer__legal a:hover{color:var(--gold)}
@media (max-width:860px){.nav__links,.nav__cta .btn{display:none}.nav__burger{display:flex}.footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer__grid{grid-template-columns:1fr 1fr}.footer__brand{grid-column:1/-1}.footer__col:last-child{grid-column:1/-1}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}}

/* ---------- learn article extras ---------- */
.article h2:first-of-type{margin-top:0}
.article figure{margin:1.8rem 0}
.article figure img{
  width:100%;max-width:420px;margin-inline:auto;
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--ink-2);padding:1.2rem;
}
.article figcaption{
  margin-top:.7rem;text-align:center;
  font-family:var(--f-mono);font-size:.74rem;color:var(--text-mute);
}
.fact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.8rem;
  margin:1.6rem 0;
}
.fact div{
  padding:.9rem 1rem;border-radius:var(--r-md);
  background:var(--ink);border:1px solid var(--line);
}
.fact b{display:block;font-family:var(--f-mono);font-size:1.15rem;color:var(--gold)}
.fact span{
  display:block;margin-top:.35rem;font-family:var(--f-mono);font-size:.66rem;
  letter-spacing:.12em;text-transform:uppercase;color:var(--text-mute);
}
.callout{
  margin:1.6rem 0;padding:1.1rem 1.2rem;border-radius:var(--r-md);
  background:rgba(230,185,46,.07);border:1px solid rgba(230,185,46,.28);
  font-size:.95rem;color:var(--text-dim);
}
.callout b{color:var(--gold)}
.meta-row{
  display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem;
}
.meta-chip{
  font-family:var(--f-mono);font-size:.68rem;padding:.32rem .65rem;border-radius:var(--r-sm);
  background:rgba(52,211,153,.12);color:var(--emerald);border:1px solid rgba(52,211,153,.3);
}
.meta-chip--mid{background:rgba(230,185,46,.12);color:var(--gold);border-color:rgba(230,185,46,.35)}
.meta-chip--adv{background:rgba(199,123,255,.12);color:#C77BFF;border-color:rgba(199,123,255,.3)}
.meta-chip--time{background:transparent;color:var(--text-mute);border-color:var(--line)}
.article code{font-family:var(--f-mono);font-size:.88em;color:var(--gold-bright);overflow-wrap:anywhere}
.next-up{
  margin-top:2.5rem;padding-top:1.6rem;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;
}
.next-up span{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-mute)}

/* audit badge — our own mark, not the auditor's logo */
.audit-badge{
  display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap;
  margin:1.8rem 0;padding:1.3rem 1.4rem;
  border-radius:var(--r-lg);
  background:linear-gradient(160deg, rgba(255,255,255,.05), rgba(255,255,255,.012));
  border:1px solid rgba(230,185,46,.28);
}
.audit-badge__shield{
  width:56px;height:56px;flex:none;display:grid;place-items:center;
  border-radius:16px;color:#0E3A26;
  background:radial-gradient(120% 105% at 30% 20%,
    #FFF8DF 0%, #FBE3A2 18%, #F0C858 40%, #E0AE23 62%, #A87310 86%, #6B4705 100%);
  box-shadow:
    inset 0 2px 2px rgba(255,253,240,.9),
    inset 0 -8px 12px rgba(66,44,0,.6),
    0 0 18px rgba(230,185,46,.4),
    0 8px 16px -8px rgba(0,0,0,.7);
}
.audit-badge__shield svg{width:26px;height:26px;filter:drop-shadow(0 1px 0 rgba(255,250,225,.85))}
.audit-badge__text{min-width:0;flex:1}
.audit-badge__by{
  font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--text-mute);
}
.audit-badge__name{
  font-family:var(--f-display);font-weight:700;font-size:1.15rem;
  color:var(--text);margin-top:.25rem;letter-spacing:-.01em;
}
.audit-badge__score{
  display:flex;align-items:baseline;gap:.45rem;margin-top:.4rem;
  font-family:var(--f-mono);font-size:.8rem;color:var(--text-mute);
}
.audit-badge__score b{font-size:1.05rem;color:var(--crimson)}
.audit-badge__link{
  flex:none;display:inline-flex;align-items:center;gap:.45rem;
  padding:.55rem 1rem;border-radius:var(--r-sm);
  background:var(--gold);color:var(--ink);font-weight:700;font-size:.8rem;
  text-decoration:none;transition:transform .25s var(--ease);
}
.audit-badge__link:hover{transform:translateY(-2px);text-decoration:none}
.audit-badge__link svg{width:13px;height:13px}
@media (max-width:520px){.audit-badge__link{width:100%;justify-content:center}}